Cephas

Cephas is the Aramaic name given by Jesus to the apostle Simon Peter, meaning 'rock' or 'stone.' It is the Aramaic equivalent of the Greek name 'Petros' (Peter). The apostle Paul frequently refers to Peter by this name in his letters. The name signifies the foundational role Peter would play in the early church, as declared by Jesus when He said, 'You are Peter, and on this rock I will build my church.'

Etymology & Roots

Cephas (Κηφᾶς) is the Greek transliteration of the Aramaic word kepha (כֵּיפָא), meaning 'rock' or 'stone.' Aramaic was the vernacular language of first-century Palestinian Jews, making this the name Jesus would have spoken in his daily tongue. The Greek equivalent is Petros (Πέτρος), derived from petra (πέτρα, 'bedrock'), and both names are applied to Simon son of Jonah throughout the New Testament.

The Aramaic form kepha appears in Syriac Christian literature and is preserved in Arabic as Kifa. John 1:42 uniquely offers an interpretive gloss: 'which means Peter (Petros),' bridging the two linguistic traditions for Greek-speaking readers.

Biblical Bearers

Cephas is the name given by Jesus to the apostle Simon son of John (John 1:42), identified throughout the Gospels primarily as Peter. He was one of the inner three disciples, the first to confess Jesus as the Christ (Matthew 16:16), and the first apostle to whom the risen Christ appeared (1 Corinthians 15:5).

Paul uses the Aramaic Cephas almost exclusively in his letters — in 1 Corinthians 1:12; 3:22; 9:5; 15:5 and Galatians 1:18; 2:9, 11, 14 — underscoring the apostle's recognition within Jewish-Christian circles. No other New Testament figure bears this name.

Theological Significance

The name Cephas encodes a divine declaration of identity and vocation. Jesus renamed Simon at their very first meeting (John 1:42), a prophetic act signifying transformation: a fisherman would become the foundational human witness of the early church. Matthew 16:18 makes explicit the wordplay — 'You are Peter (Petros), and on this rock (petra) I will build my church' — embedding the name within Christ's ecclesiological program.

Paul's use of the Aramaic Cephas in preference to the Greek Peter signals authentic apostolic tradition rooted in the eyewitness community. The name thus represents both personal transformation through divine calling and the corporate stability of the church grounded in confessional faith.

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